[1000mp] Elecraft XG1.

Sun, 15 Feb 2004 15:09:43 -0700

This discussion about S-meters reminds me of a some measurements I took a
couple of years ago on my stock MP.  You can read most of the details on
this website, compliments of Greg, W8WWW.  He was kind enough to include my
MP-specific results in this article about S-meters in general.  You can see
my portion of the article by clicking on the link that says, "Yaesu 1000MP:
More Data."

The bottom line is, despite all your efforts to tweak your MP so that -73dBm
is S9 (using the menu 9 adjustment), this will only be correct for one band,
and it will also change depending on whether you are "tuned" or "flat."
Furthermore, even for that one set of circumstances, only S-9 will be
right--the meter doesn't track very well with the "6 dB per S unit" rule,
especially for weaker signals.

So I just use my S-meter as a relative indicator most of the time.  If I
really want to be more precise for some special reason, I have to make a
mental conversion from what the meter says to what a "true" meter would say.
My conversion chart is included in the website I mentioned above.

73,
Tom / W7GT

Here's the link:
http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/SMeterBlues.htm

----- Original Message ----- 
From: "Thomas Beltran" <[email protected]>
To: <[email protected]>
Sent: Sunday, February 15, 2004 9:15 AM
Subject: Re: [1000mp] Elecraft XG1.

> Harry - thanks, and yes I remember from your Jan. 18th post:
>
> "The service manual has you set the IF gain using only 1 block on the
> s-meter lit with a +11dbu source."
>
> I'm not sure what that would be.  I figured that an S-9 setting should be
> close.  I have a friend who has some real test gear (and probably more
> important, he knows how to use it), and when I get time, I will check it
> out.  However, yesterday, I used the radio extensively after lowering the
IF
> gain to "9", and it didn't seem deaf at all.  I don't even know what dbu
> is - the oscillator puts out a -73 dBm (S-9) signal and -107dBm (1
> microvolt), which did not even register on the S-meter.  The IF gain
control
> covers some ground though, at 31, the -107 dBm was about S-8.  Perhaps
this
> control should have been on the front panel.  Tom
>
>
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